Door-check.



PATENTED JAN. 29, 1907. R. R.-SMITH.

DOOR CHECK. APPLICATION FILED 3.1, 1905. RENEWED D20. 12, 1906.

PATENT orrion.

ROBERT R. SMITH, OF PHILADELIHIA, PENNSYLVANIA.

noon-CHECK.

No. 842,350. Specification of Letters Patent. Patented J an. 29, 1907'. I

Application filed April 1,1905. Renewed December 12, 1906. Serial No. 347.551.

To a, who/7t it may concern:

Be it known that I, ROBERT R. SMITH, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia, State of Pennsylvania, have invented cer tain Improvements in Door-Checks, of which the following is a specification.

This invention is designed to provide a cushioned checking and closing apparatus for doors and the like, and its leading purpose is to secure simple and inexpensive apparatus therefor which canbe applied readily and which will operate efficiently.

Figure 1 represents a longitudinal sectional view of a form of the invention in its relation to a closed door to which it is applied. Fig. 2 represents a plan view of the structure shown in Fig. 1. Fig. 3 representsa longitudinal sectional view of a modified form of the invention; and Fig. 4 represents a plan view, partially in section, of the construction shown in Fig. 3.

In the forms shown in Figs. 1 and 2 the jamb-casing 1, having the door 2 connected thereto by the hinges 3, is provided with a strut 18, having the pivotal connection 19 with a link 20. The link has a pivotal connect1o" with a'piston 22 in the cylinder or casing 23 and works in a slot 23 of the cylinder, the latter having flanges 24 thereon for securing it to the door. A bearing-ring 25, crimped in the cylinder, limitst-he n1ovement of" the piston 22 and the plunger 26. The piston bears against a coiled spring 27, held n t-ho cylinder by the cap or hearing 28, fixed'to the end thereof, and the plunger bears against acoiled spring 29, held in the I cylinder bythe cap or hearing bearing-ring 25.

30, fixed in the opposite end thereof.

When the door is opened, the piston is moved in the cylinder to-compress the spring 27, and the spring 29, normally compressedby the greater strength of the spring 27, causes the plunger to follow the piston until the flange 26 on the plunger engages the When the door is released, the cxpansionof the spring 27, acting through the cap or hearing 28, closes it, but the clos ing action is checked by the impact of the f piston against the; plunger and the consequent thrust of the spring 29 against the cap or hearing 30. r

1 In the form of the invention sh own in Figs. 3 and 4 the 'door2, sup orted by the hinges 3, has fixgd thereto the out arm 31, having the vertical member 31.

holes 32 therein for connecting it to the part 31, has a pivotal connection 33 with a piston 34, working in a cylinder. or casing 35, the latter having a slot 35 therein, within which the link works. Flanges 36 on the cylinder providemeans by whlch'it is connected to the transom-bar 37.

A link 32, having 38, which acts as a stop for the piston 34 and a stop and bearing for the plunger 39. In the ends of the cylinder are fixed the caps or bearings 40 and 41 for supporting the springs 42 and 43.

It will be understood that the closing'and checking mechanism acts through the link and arm in a manner similar to that described in Figs. 1 and 2.

Having described my invention, I claim 1. In apparatus of,the class escribed, a movable part. a stationary p. a casing fixed to one of said parts,'a llllK pivotally connected to the other of said parts, coiled springs in said casing, a plunger in said casing actuated by one of said springs, a piston in said casing actuated by the other of said springs and pivotally connected to said link, saidplunger being adapted for checking the movement of said piston, and means for limiting the movements .of said plunger and piston toward each other, substantially as specified.

movable part, a stationary part, a strut fixed to one of said parts, a guiding device fixed to the other of said parts,- coiled springs therein,

vice and actuated by one of said springs, a

deviceand actuated in one direction-by the. other of said springs, said springs. ressing said plunger and piston toward eac other, and a link pivotally connected to said' iston and said strut, substa nt ally as specified 3. In apparatus or the class described, a" guiding device, coiled springs supported in said device, a piston in said device and actu- A to be reciprocate in said evice actuated by the otherof'said springs, said devicehaving a stop for limiting the movement of said piston and plunger toward each other,-a link pivotally connected to said plunger, and a strut pivotally connected to said link, substantially as specified.

pivotally and adjustably In the cylinder is crimped the bearingring 2. In apparatus of the class described, a

a plunger mounted to reciprocate in said depiston mounted to be reciprocated in said ated by on'e'of said s rings, a lunger mountand emovable bearings at the ends thereof, i a piston and 11m er insaid cyliuderoil 0pposits sides 0i said cylinder whigh thrust said iston and;

plunge; toward Zach thei, allin pi otally cylinder hairing a bearing crimped therein specified.

In testimony whereofifl have hereunto set lmy hunch-this 29th day 0 March, 1905, in the presence Of thesubspribin witnesses.

R0 T. B. SMITH.

4. Iii app' ratlis" of the class descrfhedla l co nneted to saicl 'link, substantially as I0 sai bearing, soiled springs'm i Witrisses:

UILEY E. GRA.NE,JI.,

connectedio said piston and reciprocating m ROBERT JAMES EARLEY.

a Slotin said cylinder, and a strut pivotally 

